*150 copies limited edition* Between 1989 and 1994, Dieter Mauson and Siegmar Fricke operated as Delta‑Sleep‑Inducing Peptide, quietly building one of the most singular bodies of work to emerge from Europe’s cassette underground. Working out of home studios scattered around Germany, the duo treated sleep itself as a compositional model: phases of drift and REM‑like intensity, recurring motifs, stray signals bleeding in from the outside world. More than 25 tapes appeared on labels across the globe, each a fragment of a larger analogue dreamscape in which consciousness, environment and electronics dissolved into one another.

L‑Tryptophan / Somnosections / Pre‑Natal brings three of their most emblematic releases together for the first time, revisiting a 1990s period that remains startlingly fresh today. Recorded with multi‑track tape machines, analogue synths, samplers, drum units and Dictaphones, these albums are full of tactile decisions: the way a loop just slightly frays with each pass, the way a radio voice is swallowed by reverb, the way a drum pattern is left half‑there, like something remembered on waking. Local radio and TV fragments drift in and out, less as commentary than as dream objects, stitched into the texture until they feel like thoughts rather than samples.

Each title opens a different portal. Somnosections (1990) is the most overtly cinematic, its “sections” tilting between seductive, mist‑wreathed ambience and suddenly insistent rhythms that feel like scenes from a lost Lynchian TV broadcast. L‑Tryptophan (1991) stretches a single 44‑minute arc into an unfurling continuum of waveform bliss: slow‑shifting chords, submerged pulses, a sense of travelling without moving as access to deeper layers of the subconscious is granted by degree. Pre‑Natal (1994) goes further into the uncanny, looping arpeggios and degraded textures into an early hauntological zone years before the term existed, prefiguring the memory‑haunted atmospheres later associated with projects like The Caretaker while retaining DSIP’s own, more bodily sense of hypnosis.

What binds these recordings is their organic flow. Despite being assembled from electronics and scavenged media, the music feels less constructed than grown, moving with a strange, subconscious logic. It resists tidy analysis: structures reveal themselves slowly, if at all, and the most important events happen in the small shifts – a filter opening, a hiss thickening, a phrase returning in slightly altered form. Across two and a half hours, L‑Tryptophan / Somnosections / Pre‑Natal shows DSIP at full strength, mapping a sonic landscape that seems to sit just beside waking reality. It is immersive, hallucinatory, deeply psychic music – as natural as breathing, as supernatural as a voice in the next room that turns out to be one of your own thoughts, playing back on tape.